The maximum block size must not be one

What causes this issue?

You can only enter values greater than 1 when using the block
restriction.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You can represent a block with a maximum size of 1 using a spacing
restriction with a minimum size of 1.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.